Question

The movement of energy through an eco system is unidirectional but the movement of nutrient is cyclic

Answer 1

Answer:

In a cyclic movement, nutrients move in an ecosystem. The flow of energy in the ecosystem is unidirectional. ... This energy is then passed on from one organism to another in a food chain. Energy given out by the organisms as heat is lost to the environment, it does not return to be used by the plants again.

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Answer 2

Answer:

energy flow is always unidirectional since it passes from one trophic level to other and it loses its energy during its flow .(10% law)

so as it reaches higher level energy is completely utilised thus cannot be reused

whereas nutrient can be reused . it refers to the movement and exchange of organic and inorganic matter back to production of living matter . thus it flow in a cyclic manner